Slide Lock Spring for Glock® — Reliable Takedown/Retention Spring
(SKU 100002721)
Restore crisp takedown feel and long-term reliability with the Slide Lock Spring for Glock® (100002721). This small but essential part provides upward tension on the slide lock (takedown lever), helping secure the slide during operation and making field-stripping smooth and consistent. If your pistol’s slide lock feels loose, mushy, or fails to retain properly, a fresh slide lock spring is the low-cost, high-impact fix to bring your Glock® back to factory-like function.
Perfect for preventive maintenance, high-mileage refreshes, and parts builds, this spring belongs in every range bag and armorer kit.
Why Replace Your Slide Lock Spring?
Restores Positive Tension
Replaces a tired or bent spring so the slide lock stays firmly seated, improving takedown feel and overall handling.
Prevents Nuisance Issues
Helps reduce unintended slide lock movement that can complicate disassembly or reassembly.
Quick, Affordable Reliability Boost
An inexpensive part that solves problems often misdiagnosed as “bigger issues.”
Great for High-Round-Count Pistols
Springs wear over time—especially on training guns. Refreshing this spring keeps the field-strip procedure consistent.
Key Features at a Glance
Product: Slide Lock Spring (for Glock® slide lock / takedown lever)
SKU: 100002721
Function: Applies upward tension to the slide lock, ensuring positive retention and proper takedown feel
Construction: Durable spring steel manufactured to consistent, repeatable dimensions
Use Cases: Routine maintenance, part replacement, builds, and armorer spares
Compatibility Note: Glock® uses model- and generation-specific slide lock springs. Many Gen1–Gen4 frames use a leaf-style spring, while certain large-frame and Gen5 pistols use different patterns (including coil/plunger styles). Confirm your exact model, caliber, and generation before ordering. When in doubt, consult your owner’s manual or a qualified armorer.
Signs You Need a New Slide Lock Spring
Slide lock/takedown lever feels loose or “mushy.”
Inconsistent tension when removing the slide.
Slide lock doesn’t return smartly after you pull it down.
Recent high round counts or a parts build using mixed components.
Installation Overview (High-Level)
Unload & Clear: Remove the magazine, lock the slide open, and visually/physically verify the chamber is empty.
Field Strip: Remove the slide per your Glock® manual.
Access the Spring: On most frames, remove the locking block pin (and trigger pin where required) to access the slide lock and spring.
Replace Spring: Lift out the slide lock, position the new spring correctly in the frame recess, and reinstall the slide lock so the spring provides upward tension.
Reassemble & Function Check: Reinstall pins in the correct order. Confirm the slide lock moves down smoothly under finger pressure and snaps back up with positive tension. Perform a complete function check before live fire.
If you’re unfamiliar with Glock® frame internals—or working across generations/aftermarket frames—have a qualified armorer/gunsmith verify installation and pin sequence.
Maintenance Tips
Keep It Clean: Grit and dried oil inside the frame can affect spring performance; clean these channels during routine service.
Run Light Lube: Avoid heavy lubrication around the spring and slide lock—excess oil attracts debris.
Schedule Refreshes: For hard-use pistols, replace small springs at reasonable intervals to maintain factory-like feel.
Frequently Asked Questions
Q: Will this spring fit all Glock® models?
A: Not all. Slide lock springs vary by model and generation. Verify your pistol’s specs (Gen, caliber, and frame size) before purchase.
Q: My slide is hard to remove. Will this fix it?
A: A fatigued slide lock spring can cause inconsistent takedown. Replace the spring; if the issue persists, inspect the slide lock itself, locking block, and pins.
Q: Do I need special tools?
A: A Glock®-size punch and a bench block make the job easier. Always follow the correct pin removal order for your generation.
Q: Should I replace other parts at the same time?
A: It’s smart to inspect the slide lock, locking block pin, and trigger pin for wear. Many armorers refresh small springs together during service.
Q: Will this change trigger pull or accuracy?
A: No. The slide lock spring affects takedown/retention, not the trigger system or barrel lockup.
SEO Highlights (Quick Scan)
Slide Lock Spring for Glock® (SKU 100002721)
Restores positive slide lock tension for consistent takedown
Ideal for preventive maintenance, high-mileage refresh, and builds
Model/Gen specific—verify compatibility before ordering
Durable spring steel construction for long service life
The Bottom Line
A dependable Glock® starts with dependable small parts. The Slide Lock Spring for Glock® (100002721) brings back crisp takedown feel and secure slide retention in minutes—and costs far less than a range day gone sideways. Verify your model and generation, drop it in (or have an armorer do it), and enjoy factory-like function again.
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